Anthraquinone vat dye.



Mon.

No Drawing.

monomethylindnnthrene in accordanoe with the following equation:

4 UNITED: STATES PA UE T 'onn on.

MAX KUG'EL, or LEvnnKiirsEu, NEAR COLOGNE; q-ERMANY, ASSIGNOR To nnmmm FABRIKEN vomvr. FBIEDR. BAYER & 00., or nnnnnmnn, GER-MANY,;.A o0m=01mnow on GERMANY.

To all whom itmwy concern:

Be it known that I, MAX KUGEL, doctor of philosophy, chemist, citizen of the German Empire, residing at Leverkusen, near logne, Germany, have invented a New Vat- Dye, of which the following is a specifica- Aocording; to United. States Letters Patents Nos. 775367, 7.75368 and 775369, amino or :ilkylnminoanthraquinones containing halogen in ()l'llllO position can be easily converted int-o hydroazins (inda-nthrenes) by elimination of hydrogen halid. I have now. made the surprising diecovery that byl 'eatr ing in tbe'suine way an equimolecula-r mixwhich are reduced by the combination of the two di erent inoleculesfeug'. molecular quantities of leaminoQ-bromm and .1-

methylainino2-bro1noanthraquinone yield Aumnmoum'oun v ii 15m.

.spe'ciflcation or Letlers :Patenti Appllcatlon ma August 25, 1910. Serial n; wanna,

lowish-brown color.

lzilosfof cotton" Patented Feb. 28, 1911.

In order to illustrate the new more fully the following example is given, the parts being b Wei glitz 10. parts of 1-" almino2-bromoant raqumone, 10.5 parts of u l-monomethy]amino-2 bron oenthraquinone, 10 parts of anhydrous sodium acetate 0.5 parts of anhydrous copper sulfate are heated t .o boi1ing1with-200 parts; of naphthalene v until the formation of the V V dye is completed. The dye'is filtered oil; washed with naphtha. alcohol and hot' Water. .It crystallizes in dark blue needles difiieult-ly soluble with a blue color in nitroben'zene and enilin, s0lu ble in ooncentrated sulfuric acid It dyes cotton from a, 'hydrosulfite vat inblue shuides The dyes, full-'11s obtained possess the remarkable property of dyeing'full and deep shades even from a. cold vat, while the known indan- ,t-h'renes are only capable of dyeing from a warm vat. This ble'to use these dyes in v conjunction Willi;

'other nve'b dyes e. g. with the-benzoy-lemino 'entl raqumoiies and enables the dyer to pro- I duce a' lei'gevariety of fast shades.

with yelproperty rendeis it possi- 10 kilos of a 10 pe rfoentypasfie ofr'nethyl- I indanthre'ne (see ekl iifiple are mixed with 40 liters of water of 40 i e L, 4; liters caustic soda lye (3F? B.) and 30 liters of hydrosulfite (17 Be.) are'added, The mixture is which-requires about 20minutes. This soluw l ed-f on I I he cold;

I The new dyes are aft e'r beingdfied, i

pulverized blue powders soluble in boiling" nitrobenzene with from a. blue toblue em;

color; soluble in concentrated sulfulic 'nc id with from afyellowisli-brown'to green polo]? being trans ormedinto hydro com ounds green-bineshedes'.

lion ispassed-througli e -fsieve-intofthe dye f 1-,000 liiersof cold 1 v sulfite solution ;(1-7 P o f AB.) aHdAOkilosof coinimoiii salt'he ve been added; The-bath: isfivellstirredand I50 fyn'rn after haj-ving, [be n Y v W h te'redt --=The. colton is worlgedgforiu'to. ho ft well stirred until the -colon is" dissolved; I

substantially 2?. 985,352 r I [ialkylmninoanthraquinones, which dyes are l-methylamino-Q-brmnbigihthraquinone and after being dried and pulverized blue powl-amino-2-bron1oanthraquinone, which dye- (leis soluble in boiling nitrobenzene with f situfl crystallizes in dark blue needles, diifia blue to bluegree'n color; soluble in concultly soluble with a blue color in nitroeentruted sulfuric acid With from a yellowbenzene 'and anilin, soluble in concentrated ish-brown to green color; being transformed I sulfuric acid with a yellowish-brown color; into hydro-compounds on suitable reduction 5 dyeing the fiber from a hydrosulfite vat in with hydr'osulfite and caustic soda. lye, the I blue shades, substantially as described. alkaline solution thus obteined exhibiting In testimonywhereof I have hereunto set the typical properties ofa vet which presence of two subscribing 25 dyes'the fiber pure blue-co green-blue shades, 1

' 'MAX KUGEL. [1..s.]

my hand in the Witnesses. as de'c'ribed! 2, The herein described new dyestuff be ing a hydroezin derivative of the anthra- Ctfifli; seriee which czin be obtained from i Witnesses:

CHAS. J. WRIGHT, WALTER VONNEGUT. 

